IBM THINKPAD T400S Hardware Maintenance Manual page 60

Table 2. Numeric error codes (continued)
Symptom or error
02F7
Fail-safe timer NMI failed
1801
Attached docking station is not supported
1802
Unauthorized network card is plugged in—Turn off and
remove the miniPCI network card.
1803
Unauthorized daughter card is plugged in—Turn off and
remove the daughter card.
1804
Unauthorized WAN card is plugged in—Power off and
remove the WAN card.
1805
Unauthorized Wireless USB card is plugged in—Power off
and remove the Wireless USB card.
1810
Hard disk partition layout error.
1820
More than one external fingerprint reader is attached.
Power off and remove all but the reader that you set up
within your main operating system.
1830
Invalid memory configuration—Power off and install a
memory module to Slot-0 or the lower slot.
2000
Hard Drive Active Protection sensor diagnostics
failed.Press <Esc> to continue.Press <F1> to enter
SETUP
54
Hardware Maintenance Manual
FRU or action, in sequence
1. DIMM.
2. System board.
Shut down the computer and remove it from the
docking station.
1. Remove Mini PCI network card.
2. System board.
1. Remove the daughter card that you installed.
2. System board.
1. Remove the WAN card that you installed.
2. System board.
1. Remove the Wireless USB card that you installed.
2. System board.
1. If the Access Predesktop Area has been previously
disabled, then go to the BIOS Setup Utility by
pressing F1 to open the BIOS Setup Utility. Select
Security ➙ Predesktop Area ➙ Access Predesktop
Area. Set this item to Disabled. Save and exit.
2. If the Access Predesktop Area has not been
previously disabled, press Enter to load Access
Predesktop Area. Then run RECOVER TO FACTORY
CONTENTS in Access Predesktop Area.
3. If item 2 failed, press F3 in the Welcome screen in
RECOVER TO FACTORY CONTENTS. Run FDISK,
and then delete all partitions. Run RECOVER TO
FACTORY CONTENTS in Access Predesktop Area
again.
4. If item 3 failed, select CD-ROM boot in Startup in
Access Predesktop Area. Boot from the Recovery
CD and perform full recovery from it.
5. If item 4 failed, replace the hard disk drive.
Remove all but the reader that you set up for the
authentication.
Install DIMM in Slot-0, but not in Slot-1.
Note: For the construction of the DIMM slot, see "1040
DIMM" on page 78.
1. Undock docking station or port replicator if it is
attached to the ThinkPad Notebook.
2. Place the ThinkPad Notebook on a horizontal surface.
Do not apply any physical shock to the computer.
3. Run Diagnostics ®ThinkPad Device ® HDD Active
Protection Test.